HP XP7 Storage - Manual (Page 137)

If the pool is blocked and the pairs are suspended, complete the following:
1. Restore the power.
2. Recover the pools (see “Recovering blocked pools” (page 128) ).
If you interrupt the storing of snapshot data by consistency group by switching off the power supply
and the status of all the pairs in a consistency group has not completely changed, the storing of
snapshot data is not resumed when you switch the power supply on again. The status of some
pairs may remain unchanged.
Power supply and losing data in shared memory
If you lose power and the data in the SM, complete the following:
1. Restore the power.
2. Recreate the pools and pairs.
Preventing the loss of pool and pair data
To prevent the loss of pool and pair data in SM and having to recreate the pools and pairs, replace
microcode online. Do not replace the microcode offline, for example, when you need to change
the SM configuration.
Maintaining pairs by switching off the storage system power and replacing the microcode 137